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BIOL164Ch5NotesWin12

BIOL164Ch5NotesWin12 - Ch 5 The Skeletal System Elements of...

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1 Ch. 5 – The Skeletal System Elements of the skeletal system : The bones of the skeleton (~ 206 of them!) The cartilages, ligaments, and other CTs that stabilize and connect the bones Functions : – Physical/structural support Movement (by providing levers for muscles to pull on) Protection (of internal organs and soft tissues) Storage of minerals (mainly calcium and phosphorus) and fat/energy (in yellow marrow) Blood cell production (in red marrow) Parts of a typical long bone Diaphysis = the shaft Epiphyses = the ends Metaphysis = the union between the shaft and end The metaphyhsis of growing bone contains the epiphyseal plate (which is a hyaline cartilage growth plate) Articular cartilage = the hyaline cartilage that covers the ends of the bones in joints – Function : reduces friction Periosteum = the dense CT that surrounds bone; it’s needed for bone growth, repair, and blood/nerve supply Internal bone cavities contain red marrow (in the spongy bone cavities) or yellow marrow (in the main central cavity of the shaft) Metaphysis Articular cartilage Epiphysis Epiphysis Diaphysis Figure 5.1
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